You see Sam's paw move over towards the keys.
"Hey, Sam, I'm not sure if yo-"
Then Sam presses down, everything is obscured by a bright white light.
When it clears, you feel rather strange. You're able to see around you, but your perspective seems skewed and when you attempt to look around almost seems like you're flipping to another nearby camera angle instead of moving your eyes. You try to move with little success, only managing to vibrate, your view shaking.
Sam steps towards you and you gasp. From your new perspective, the cat looks huge trotting towards you, then walking around you in a circle. In fact, now that you notice this, you realize the entire room looks bigger and you seem to be...lying on the floor? You feel some nervousness as Sam trots closer and closer to you, before leaning in to give you a curious sniff.
"Wow. Did not expect this?" Sam muses.
"Did not expect what, Sam?" you ask.
Sam gives a surprised meowl and jumps back, back arched. He hisses at you, back arched, fur poofed out.
"Dude, what the hell?"
"O-Oh," Sam calms himself, sitting down, fur settling. "I just didn't expect you to speak like...ur...this."
"Like what? Sam, you're kinda freaking me out. Why do I feel so weird?"
"Ah, ur, not sure how to put this, but seems like the keys turned you into..." Sam pauses, his whiskers twitching, rubbing a paw on his chin in thinking gesture. "There's no good way to say this, but you're a litter box."
The strange nervousness you've been feeling as Sam walks around you comes into sharp focus. You sputter. "W-What? How did this happen?!"
"I mean, considering all the strange stuff that's happened with the keys so far, this really shouldn't be a surprise, right?"
"Well, no, but that happened to others! This happened to me!"
"Ah, you can deal out the weird changes, but unwilling to be unable to be dealt the weird changes. I see how it goes." Sam manages a smirk even with his feline face, which you'd be impressed with under different circumstances.
"You know what I mean!"
"Well, guess I could try and change you back. However..."
"What? Why can't you turn me back right now?"
"I think the keys sorta read my mind a little. I mean, there's all these weird instincts and feelings that are scampering about in this new cat brain of mine. All this stuff that I want and need. Stuff I wanna eat, stuff I want chase, stuff I want scratch, warm comfy spots I wanna sprawl on, lady cats I'd like to woo and/or hump. But if I'm being honest, one of the top needs on my mind at the moment is that...I have to...go." Sam squirms where he's seated, tail twitching.
"You've got to be kidding me."
"I'm afraid I'm not."
"Sam. I'm your friend. You can't use me for...that."
"Well, that sorta seems your function at the moment."
"Sam. Wait, y-"
Sam stepped into you and the moment his paw made contact with your kitty litter insides, something you could somehow FEEL, your voice cut off. However, nothing else cut off. You could still see Sam as he steps into you, your vision shifting depending where Sam moved in you. He walked in a circle, his tail twitching.
"Hey? Can you hear me? Huh. That's weird. Hope he's OK." He stands there, looking about the room, his rear legs stepping in place, he seems to be in thought.
You continue to try and get Sam's attention, pleading with him to try using the toilet or even the kitchen sink. Hell, even the kitchen floor would be preferred to THIS.
Sam seems to make up his mind. He lowers his cat butt, then proceeds to do his business.
At least you don't seem to possess either taste or smell in this form, but you still seem to possess some weird something you can only think to describe as litter box extrasensory perceptions, which were almost more concerning, doing things like calculating like the feline's sex, age, and diet as Sam went through his bathroom ritual.
Soon enough, Sam finishes, stepping forward, then kicking litter over his leavings. He stretches, then hops out of you, your speaking and ability to shiver your form slightly being regained.
"Sam! What the fuck?!"
"What can I say, when you gotta go, you gotta go?" Sam sit down and licks his paw. "Thanks for being so accommodating dude."
You sputter and growl at Sam, meanwhile being unable to stop feeling the stuff that Sam left in you in concerning detail.
Sam doesn't even seem guilty, he just has a feline bemusement on his muzzle. "On the bright side, I can try turning you back now."